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Get ready to sparkle with knowledge! Diamonds have been dazzling humans for centuries, but how much do you really know about these precious gems? From their mysterious origins deep within the Earth to their appearances in popular culture, diamonds have a rich history and a multitude of fascinating properties. In this article, we’ll dive into 100 incredible diamond facts that will make you appreciate these glamorous stones even more. So, put on your virtual mining helmet and let’s uncover the secrets of diamonds together!

100 Diamond Facts

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1. A Diamond fact is that they are the hardest natural substance on Earth, scoring a perfect 10 on the Mohs scale of mineral hardness.

2. The word “diamond” comes from the Greek word “adamas,” which means invincible or indestructible.

3. Despite their hardness, diamonds are brittle and can break if hit with enough force in the right spot.

4. Diamonds are made of carbon, the same element found in graphite (pencil lead) and charcoal.

5. Most diamonds are formed deep within the Earth’s mantle, about 90 to 150 kilometers underground.

6. Diamonds are brought to the surface through deep-source volcanic eruptions that transport magma from the upper mantle to the surface.

7. These eruptions form narrow, pipe-like structures called kimberlites, which are the primary sources of mined diamonds.

8. The oldest diamonds are believed to be over 3 billion years old, making them older than most life on Earth.

9. The largest diamond ever found was the Cullinan Diamond, discovered in South Africa in 1905, weighing an incredible 3,106 carats (about 1.3 pounds).

10. The Cullinan Diamond was later cut into several smaller stones, including the Great Star of Africa (530.2 carats) and the Lesser Star of Africa (317.4 carats).

11. Diamonds are graded based on the “4 Cs“: cut, clarity, color, and carat weight.

12. The cut of a diamond refers to its proportions, symmetry, and polish, which greatly influence its sparkle and brilliance.

13. Clarity measures the presence of inclusions (internal flaws) and blemishes (external imperfections) in a diamond.

14. Diamond color is graded on a scale from D (colorless) to Z (light yellow or brown), with colorless diamonds being the most valuable.

15. Carat weight is a measure of a diamond’s mass, with one carat equaling 0.2 grams or 0.007 ounces.

16. The most popular diamond shape is the round brilliant cut, which has 57 or 58 facets to maximize light reflection and sparkle.

17. Other popular diamond shapes include princess, cushion, oval, emerald, pear, and marquise.

18. Fancy colored diamonds, such as pink, blue, green, and red, are extremely rare and valuable.

19. The most expensive diamond ever sold at auction was the “Pink Star,” a 59.60-carat fancy vivid pink diamond that sold for $71.2 million in 2017.

20. Diamonds have been used as symbols of love, commitment, and eternal devotion for centuries.

21. The ancient Romans believed that Cupid’s arrows were tipped with diamonds, adding to the gem’s romantic allure.

22. In ancient Greece, diamonds were believed to be the tears of the gods and were thought to possess divine powers.

23. The diamond is the official birthstone for the month of April and is also associated with the 60th and 75th wedding anniversaries.

24. Some famous diamonds are believed to be cursed, such as the Hope Diamond, a 45.52-carat blue diamond with a mysterious history.

25. Diamonds have numerous industrial applications due to their exceptional hardness and heat conductivity.

26. Industrial-grade diamonds are used in cutting tools, drill bits, grinding wheels, and polishing compounds.

27. Diamonds are also used in high-end audio equipment, such as speaker domes, due to their stiffness and low mass.

28. Scientists have discovered a planet called 55 Cancri e that may be composed largely of diamond, earning it the nickname “The Diamond Planet.”

29. Diamonds have a high refractive index (2.417), meaning they bend light more than most other materials, contributing to their characteristic brilliance.

30. Diamonds also have a high dispersion rate, which means they can separate white light into its spectral colors, creating a mesmerizing rainbow effect known as “fire.”

31. Diamonds are excellent thermal conductors, which means they can quickly transfer heat from one part of the stone to another.

32. Some diamonds can fluoresce under ultraviolet light due to the presence of certain atomic impurities, such as boron or nitrogen.

33. Diamonds have been found in meteorites, suggesting that these gems can form not only on Earth but also in outer space.

34. Tiny diamonds, called nanodiamonds, have been discovered in the fossilized remains of many plant species.

35. Nanodiamonds have also been found in the bones and soft tissues of animals, including dinosaurs, indicating their ancient origins.

36. The Smithsonian Institution in Washington, D.C., houses some of the world’s most famous diamonds, including the Hope Diamond and the Blue Heart Diamond.

37. The Diamond District in New York City, located on 47th Street between Fifth and Sixth Avenues, is one of the world’s primary centers for diamond trading.

38. Antwerp, Belgium, is known as the “Diamond Capital of the World,” with a history of diamond trade dating back to the 15th century.

39. The Kimberley Process, established in 2003, is an international certification scheme designed to prevent “conflict diamonds” from entering the mainstream diamond market.

40. Conflict diamonds, also known as “blood diamonds,” are diamonds mined in war zones and sold to finance armed conflicts and human rights abuses.

41. The movie “Blood Diamond” (2006) starring Leonardo DiCaprio brought attention to the issue of conflict diamonds and their impact on African communities.

42. The phrase “diamond in the rough” refers to a person or thing with hidden potential or value, much like an uncut diamond before it is polished.

43. In some cultures, diamonds are believed to have healing properties and are used in traditional medicine to treat various ailments.

44. The Diamond Sutra, a sacred Buddhist text dating back to 868 CE, is considered the world’s oldest printed book and features the word “diamond” in its title.

45. In feng shui, diamonds are believed to promote clarity, abundance, and energy flow when placed in certain areas of a home or workspace.

46. The song “Diamonds Are a Girl’s Best Friend” was popularized by Marilyn Monroe in the 1953 film “Gentlemen Prefer Blondes.”

47. The James Bond novel and film “Diamonds Are Forever” (1971) centers around a diamond smuggling operation and features several references to the precious gems.

48. The “Diamond Sūtra,” a sacred Mahayana Buddhist text, is one of the oldest known printed books in the world, dating back to 868 CE.

49. In ancient Hindu mythology, the god Krishna was said to have gifted his lover Radha with a diamond that represented his eternal love for her.

50. The famous diamond company De Beers coined the slogan “A Diamond is Forever” in 1948 as part of a marketing campaign to associate diamonds with eternal love and commitment.

51. The tradition of giving diamond engagement rings can be traced back to the 15th century when Archduke Maximilian of Austria gave Mary of Burgundy a diamond ring as a symbol of their betrothal.

52. The first recorded diamond engagement ring was given by Archduke Maximilian of Austria to Mary of Burgundy in 1477.

53. In the early 20th century, diamond engagement rings became more widely available and affordable due to increased diamond production and improved cutting techniques.

54. Today, nearly 75% of engaged women in the United States receive a diamond engagement ring.

55. The average size of a diamond engagement ring in the United States is around 1 carat.

56. In some cultures, diamonds are not the preferred gemstone for engagement rings. For example, in France, emeralds are a popular choice.

57. In ancient times, diamonds were believed to have magical powers and were used as talismans to ward off evil spirits and protect the wearer from harm.

58. In medieval Europe, diamonds were thought to have healing properties and were used to treat a variety of ailments, including brain diseases and intestinal issues.

59. During the Renaissance, diamonds became a symbol of power and wealth among European nobility and were often used to adorn crowns, scepters, and other royal regalia.

60. The famous “Diamonds are a girl’s best friend” phrase was coined by Carol Channing in the 1949 Broadway musical “Gentlemen Prefer Blondes.”

61. Marilyn Monroe famously sang the song “Diamonds Are a Girl’s Best Friend” in the 1953 film adaptation of the musical.

62. The song has since been covered by numerous artists, including Madonna, Kylie Minogue, and Nicole Kidman.

63. The phrase “Diamonds are forever” was popularized by the James Bond novel and film of the same name, further cementing the association between diamonds and eternal love.

64. In addition to engagement rings, diamonds are often used in other types of jewelry, such as pendants, earrings, and bracelets.

65. The world’s most expensive pair of diamond earrings, named “Apollo and Artemis,” sold for $57.4 million at auction in 2017.

66. The “Oppenheimer Blue,” a 14.62-carat fancy vivid blue diamond, set the record for the most expensive diamond ever sold at auction in 2016, fetching $57.5 million.

67. In 2013, a 118.28-carat oval diamond known as the “Magnificent Oval Diamond” sold for $30.6 million at a Sotheby’s auction in Hong Kong.

68. The “Pink Legacy,” an 18.96-carat fancy vivid pink diamond, sold for $50.3 million at a Christie’s auction in Geneva in 2018.

69. The “Blue Moon of Josephine,” a 12.03-carat fancy vivid blue diamond, sold for $48.4 million at a Sotheby’s auction in Geneva in 2015.

70. Diamonds have been featured in numerous films, songs, and works of literature, often symbolizing wealth, power, and romance.

71. In the film “Titanic” (1997), the “Heart of the Ocean” diamond plays a central role in the love story between Jack and Rose.

72. The song “Diamonds” by Rihanna, released in 2012, compares the strength and resilience of the human spirit to the hardness and brilliance of diamonds.

73. In the novel “The Moonstone” by Wilkie Collins, published in 1868, a large yellow diamond is at the center of a mystery and serves as a symbol of exotic wealth and colonial conquest.

74. Diamonds have also been featured in famous works of art, such as the “Daria-i-Noor” diamond, which is part of the Iranian Crown Jewels and is displayed at the Central Bank of Iran.

75. The “Koh-i-Noor” diamond, one of the largest cut diamonds in the world, is part of the British Crown Jewels and is set in the Queen Mother’s Crown.

76. The “Regent Diamond,” a 140.64-carat diamond, is on display at the Louvre Museum in Paris and is considered one of the finest diamonds in the world.

77. The “Sancy Diamond,” a 55.23-carat pale yellow diamond, has been owned by several European royal families and is now part of the French Crown Jewels.

78. The “Hortensia Diamond,” a 20.53-carat pale orange-pink diamond, is named after Hortense de Beauharnais, the stepdaughter of Napoleon Bonaparte, and is part of the French Crown Jewels.

79. The “Florentine Diamond,” a 137.27-carat yellow diamond, was once owned by the Medici family and is now believed to be lost or stolen.

80. The “Idol’s Eye,” a 70.21-carat semi-triangular diamond, is named after a legend that it was once set in the eye of an idol in a temple in India.

81. The “Orlov Diamond,” a 189.62-carat diamond, is set in the Imperial Scepter of Russia and is part of the Diamond Fund collection in Moscow.

82. The “Shah Diamond,” an 88.7-carat diamond, is inscribed with the names of three Persian rulers and is believed to have originated from the Golconda mines in India.

83. The “Nur-ul-Ain Diamond,” a 60-carat pale pink diamond, is part of the Iranian Crown Jewels and is set in a tiara worn by the last Empress of Iran.

84. The “Darya-ye Noor Diamond,” a 182-carat pale pink diamond, is the largest diamond in the Iranian Crown Jewels and is believed to have originated from the Golconda mines in India.

85. The “Eureka Diamond,” a 10.73-carat yellow diamond, was the first diamond discovered in South Africa in 1866 and sparked the Kimberley Diamond Rush.

86. The “Taylor-Burton Diamond,” a 68-carat diamond, was purchased by Richard Burton for Elizabeth Taylor in 1969 and was later sold to fund a hospital in Botswana.

87. The “Millennium Star,” a 203.04-carat D-flawless diamond, is one of the rarest and most valuable diamonds in the world and was discovered in the Democratic Republic of Congo.

88. The “Centenary Diamond,” a 273.85-carat D-flawless diamond, was discovered in the Premier Mine in South Africa and was named to commemorate the centennial of De Beers Consolidated Mines.

89. The “Star of Sierra Leone,” a 968.9-carat diamond, is the fourth-largest uncut diamond in the world and was discovered in Sierra Leone in 1972.

90. The “Golden Jubilee,” a 545.67-carat brown diamond, is the largest faceted diamond in the world and was discovered in the Premier Mine in South Africa.

91. The “Spirit of de Grisogono,” a 312.24-carat black diamond, is the largest cut black diamond in the world and was set in a white gold ring with 702 smaller white diamonds.

92. The “Incomparable Diamond,” a 407.48-carat yellow diamond, is the third-largest faceted diamond in the world and was discovered in the town of Mbuji-Mayi in the Democratic Republic of Congo.

93. The “Moussaieff Red,” a 5.11-carat red diamond, is the largest known red diamond in the world and was discovered in Brazil in the 1990s.

94. The “Ocean Dream,” a 5.51-carat fancy vivid blue-green diamond, is one of the rarest and most unusual colored diamonds in the world.

95. The “Wittelsbach-Graff Diamond,” a 31.06-carat deep blue diamond, has a history dating back to the 17th century and was once part of both the Austrian and Bavarian Crown Jewels.

96. The “Moussaieff Blue,” a 6.04-carat fancy vivid blue diamond, is one of the rarest and most valuable blue diamonds in the world.

97. The “Pumpkin Diamond,” a 5.54-carat fancy vivid orange diamond, was discovered in the Central African Republic and is one of the largest known orange diamonds in the world.

98. The “Steinmetz Pink,” a 59.60-carat fancy vivid pink diamond, is the largest known fancy vivid pink diamond in the world and was discovered in South Africa.

99. The “De Beers Millennium Jewel 4,” a 10.10-carat fancy vivid blue diamond, was discovered in the Cullinan Mine in South Africa and was sold at auction for $31.8 million in 2016.

100. The “Graff Pink,” a 24.78-carat fancy intense pink diamond, set a world record for the most expensive diamond ever sold at auction when it fetched $46.2 million in 2010.


From their formation deep within the Earth to their starring roles in Hollywood films and royal collections, diamonds have captured the hearts and imaginations of people around the world for centuries. These precious gems are not only prized for their beauty and rarity but also for their fascinating history, cultural significance, and scientific properties. Whether you’re a diamond enthusiast, a jewelry lover, or simply someone who appreciates the wonders of nature, these 100 diamond facts are sure to leave you with a newfound appreciation for these incredible stones. So the next time you see a diamond sparkle, remember the long journey (and the 100 diamond facts) it has taken to reach you and the countless stories it has to tell.

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